The Astell&Kern AK100 is the ultimate portable high-fidelity audio system capable of studio Mastering Quality Sound (MQS) support and playback. MQS (24bit, 96kHz -192kHz) is considered as the digital music format with the most amount of information. MQS sources are commonly saved as a lossless 24bit WAV or FLAC files during record production at the time of the mastering source and the difference between MQS and MP3s/CDs (WAV) can be heard and felt because the sound is distortion free and there is no data loss within the MQS (24bit) source.

With the integrated Wolfson WM8740 high-performance DAC, the Astell&Kern AK100 MQS (Mastering Quality Sound) Portable System meets the demanding criteria of Hi-Fi audio even from its small size. The Astell&Kern AK100 does not need external MQS encoding and results in a more refined and pure sound.